8905661 has 4 divisors (see below), whose sum is σ = 9374400. Its totient is φ = 8436924.

The previous prime is 8905657. The next prime is 8905679. The reversal of 8905661 is 1665098.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8905661 - 2² = 8905657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8905681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234341 + ... + 234378.

It is an arithmetic number, because the mean of its divisors is an integer number (2343600).

Almost surely, 2^8905661 is an apocalyptic number.

It is an amenable number.

8905661 is a deficient number, since it is larger than the sum of its proper divisors (468739).

8905661 is a wasteful number, since it uses less digits than its factorization.

8905661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468738.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 8905661 is about 2984.2354129659. The cubic root of 8905661 is about 207.2790389935.

The spelling of 8905661 in words is "eight million, nine hundred five thousand, six hundred sixty-one".